Rosemont in Spring

In spring (March, April and May), Rosemont sees average daytime highs around 73°F and overnight lows near 50°F, with 7.2 in of rain over about 19 wet days across the season. It is the 3rd-warmest season and the 2nd-wettest season.

Over the season highs climb from about 64°F in early March to 83°F by late May. The sky is clear or mostly clear about 46% of the time across spring, and the air most often feels dry.

Spring is Rosemont's best season of the year to visit on our travel score. For the whole year in context, see Rosemont's year-round climate.

Avg daytime high: 73°F; 3rd-warmest season
Avg overnight low: 50°F
Rainfall: 7.2 in; 19 wet days
Avg wind: 5 mph
Travel score: 7.2; best season of the year
Months: Mar · Apr · May

← Winter Rosemont year-round climate Summer →

Spring Summer Fall Winter

Temperature in Rosemont in Spring

Average highAverage lowShaded bands: 10–90% of days

Over the season highs climb from about 64°F in early March to 83°F by late May.

A typical spring day in Rosemont reaches about 73°F and drops to 50°F overnight. The warmest of the three months is May, the coolest March.

How spring really feels in Rosemont

Once humidity and wind are folded in, spring brings about 0 days that feel above 90°F and 0 that feel at or below 32°F.

Days feeling ≥ 90°F

heat index over the day's high

Days feeling ≤ 32°F

wind chill below the day's low

spring sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Rosemont weather by month

How the three spring months (March, April and May) compare with the rest of the year — the season's months are highlighted.

Month	High / Low (°F)	Rainfall (inches)	Wet days	Daylight (hours)	Travel score
Jan	57° / 41°	4.9	9.5	9.6	4.2
Feb	62° / 43°	4.7	9.6	10.5	5.2
Mar	66° / 46°	4.1	9.2	11.7	6.3
Apr	72° / 50°	1.9	5.8	13	7.5
May	80° / 55°	1.1	4	14.1	7.7
Jun	88° / 59°	0.2	1	14.6	5.9
Jul	91° / 62°	0.0	0.1	14.4	4.8
Aug	91° / 61°	0.1	0.2	13.5	5.0
Sep	87° / 59°	0.1	0.7	12.3	6.4
Oct	78° / 53°	1.4	3.2	11	8.3
Nov	65° / 45°	2.6	6.6	9.9	6.5
Dec	57° / 40°	4.8	9.7	9.4	4.1

Cloud cover in Spring

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 46% of the time across spring.

Chance of precipitation in Spring

Any precipitation

Rosemont gets around 7.2 in of rain over 19 wet days across spring. The line is the day-by-day chance of measurable precipitation.

Humidity in Spring

DryComfortableHumidMuggyOppressiveMiserable

Most of spring feels dry — the stacked bands show each day's mix of comfort levels, read off the dew point.

Wind in Spring

Winds average 5 mph across spring.

Sunrise & sunset in Spring

DaylightNight

Daylight runs from about 11 h 06 min in early March to 14 h 30 min by late May. The lit band spans sunrise to sunset each day.

Solar energy in Spring

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day across spring, about 6.0 kWh/m².

Planning a trip in spring

Hazard calendar for Rosemont

In seasonPeak

In spring, Rosemont overlaps its rainy season season. The full year is below, with each hazard's peak months called out.

Rosemont's rainy season runs November–March, when most of the year's rain falls.

Rainy season

Jan

Feb

Mar

Apr

May

Jun

Jul

Aug

Sep

Oct

Nov

Dec

Is spring a good time to visit Rosemont?

Our two travel scores rate spring for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal), averaged across the three months.

7.2

Sightseeing

1st-best month of the year

5.4

Beach & pool

3rd-best month of the year

spring is one of the better times to visit Rosemont for general sightseeing.

What to pack for Rosemont in Spring

From spring's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In spring, Rosemont sees daytime highs around 73°F and nights near 50°F. Pack sun protection. Worth having: light clothes and rain gear. About 19 days see rain.

sun protectionlight clothesrain gear

UV index in Rosemont in Spring

LowModerateHighVery highExtreme

Clear-sky midday UV across spring averages around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Rosemont peaks around June 21 at about 10 (very high) — sunscreen, a hat and midday shade are essential. It bottoms out near December 14 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 9 months of the year.

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
UV index (midday)	2	3	4	6	8	10	10	9	6	5	2	2
Level	Moderate	Moderate	Moderate	High	Very high	Very high	Very high	Very high	High	Moderate	Moderate	Low

	UV index (midday)	Level
Jan	2	Moderate
Feb	3	Moderate
Mar	4	Moderate
Apr	6	High
May	8	Very high
Jun	10	Very high
Jul	10	Very high
Aug	9	Very high
Sep	6	High
Oct	5	Moderate
Nov	2	Moderate
Dec	2	Low

Air quality in Rosemont in Spring

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where spring falls, not just the annual average.

Air quality in Rosemont is worst in August — around 27 µg/m³ PM2.5 (moderate), about 3.6× the cleanest month (June, 8 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
PM2.5 (µg/m³)	15	14	15	12	9	8	11	27	23	17	19	14
Level	Moderate	Moderate	Moderate	Good	Good	Good	Good	Moderate	Moderate	Moderate	Moderate	Moderate

	PM2.5 (µg/m³)	Level
Jan	15	Moderate
Feb	14	Moderate
Mar	15	Moderate
Apr	12	Good
May	9	Good
Jun	8	Good
Jul	11	Good
Aug	27	Moderate
Sep	23	Moderate
Oct	17	Moderate
Nov	19	Moderate
Dec	14	Moderate

Location & terrain

Where is Rosemont?

Rosemont sits at 38.6°N, 121.4°W, 49 ft above sea level, in United States. The nearest listed city is Arden-Arcade, 3.7 mi away.

Topography around Rosemont

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Rosemont.

Within 2 miles, the terrain around Rosemont has only modest variations in elevation — a maximum elevation change of 108 ft around an average of 52 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 328 ft; within 50 miles, very significant variations in elevation — a maximum elevation change of 5,384 ft.

The land around Rosemont is covered by artificial surfaces (51%) and trees (20%) within 2 miles, artificial surfaces (43%), grassland (28%) and trees (20%) within 10 miles, and trees (34%), grassland (31%) and cropland (23%) within 50 miles.

2 miles

108 ft

artificial surfaces 51%

10 miles

328 ft

artificial surfaces 43%

50 miles

5,384 ft

trees 34%

treesgrasslandcroplandartificial surfacesbare terrainwaterwetland

← Winter Rosemont year-round climate Summer →

Spring weather nearby: Arden-Arcade 3.7 mi · Rancho Cordova 4.3 mi · Florin 4.3 mi · Carmichael 5.0 mi · Vineyard 6.2 mi · Sacramento 7.5 mi · Fair Oaks 8.1 mi · Foothill Farms 8.7 mi

United States travel facts

Power plugs: Type A / B; 120 V · 60 Hz
Prices: ≈ 100% of US; price level, 2025
GDP per capita: $90,027; 2025
Happiness: 6.8 / 10; World Happiness, 2025
Safe drinking water: 98%; of population, 2024
Homicide rate: 5.8; per 100k, 2023
Road deaths: 12.7; per 100k/yr, 2019
Income group: High; World Bank
Religion

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Rosemont (38.5519°, -121.3647°, elevation 49 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google.